Key facts
- Brand
- Atmel
- Model
- 32-MEGABIT
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-11
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ATMEL AT45DB321D 32-megabit 2.7-volt DataFlash handbook
The AT45DB321D is a 32‑Mbit serial‑interface DataFlash memory that operates from a single 2.7 V to 3.6 V supply. It offers a RapidS™ serial interface with up to 66 MHz clock frequency, configurable page sizes of 512 or 528 bytes, and two SRAM buffers that allow data reception while re‑programming the main array. The device includes hardware and software data‑protection features, a 128‑byte security register, and a unique 64‑byte device identifier.
The datasheet provides pin configurations for SOIC, TSOP and MLF packages, a block diagram of the memory architecture, and detailed command descriptions for continuous array reads, page reads, buffer reads, and program/erase operations. Timing diagrams and electrical specifications are included to aid designers in integrating the part into voice, image, code, or data‑storage applications.
Atmel 32-MEGABIT specifications
| Supply Voltage | 2.7 V – 3.6 V |
|---|---|
| Maximum Clock Frequency | 66 MHz |
| Memory Size | 32 Mbit (34,603,008 bits) |
| Page Size | 512 bytes or 528 bytes |
| Number of Pages | 8,192 |
| SRAM Buffers | 2 × 512/528 bytes |
| Active Read Current | 7 mA typical |
| Standby Current | 25 pA typical |
| Deep Power‑Down Current | 5 pA typical |
| Program/Erase Cycles | 100,000 per page minimum |
| Data Retention | 20 years |
Source: ATMEL AT45DB321D 32-megabit 2.7-volt DataFlash handbook
All Atmel 32-MEGABIT documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What supply voltage range does the AT45DB321D operate at?
It operates from a single 2.7 V to 3.6 V supply for both programming and reading.
From: ATMEL AT45DB321D 32-megabit 2.7-volt DataFlash handbook
What is the maximum SPI clock frequency supported by the AT45DB321D?
The device supports a maximum serial‑interface clock frequency of 66 MHz.
From: ATMEL AT45DB321D 32-megabit 2.7-volt DataFlash handbook
What voltage range is required for read and write operations?
The device operates with a single supply between 2.65 V and 3.6 V for both reading and writing.
From: ATMEL -32-megabit (2M x 16/4M x 8) 3-volt Only Flash Memory AT49BV322D AT49BV322DT handbook
How many erase cycles are guaranteed for the AT49BV322D?
The memory is guaranteed for a minimum of 100 000 erase cycles.
From: ATMEL -32-megabit (2M x 16/4M x 8) 3-volt Only Flash Memory AT49BV322D AT49BV322DT handbook